The only, most stable nucleus formed by bombarding either `._(13)^(27)Al` by neutrons of `._(11)^(23)Na` by deutrons is

The only, most stable nucleus formed by bombarding either `._(13)^(27)Al` by neutrons of `._(11)^(23)Na` by deutrons is
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The only, most stable nucleus formed by bombarding either `._(13)^(27)Al` by neutrons of `._(11)^(23)Na` by ... ._(12)^(24)Mg` D. `._(56)^(137)Ba`
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If an atomic number of an element is 6 and its mass is 14 how many neutrons are contained in the nucleus?

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